Suspended metal clad refractory



Sept 28, 1965 J. A. cRooKsToN ETAL 3,208,412

SUSPENDED METAL CLAD REFRACTORY 2 Sheets-Sheet l Filed 00T.. l, 1962 Sept 28, 1965 J. A. cRooKsToN ETAL 3,208,412

SUSPENDED METAL CLAD REFRACTORY Filed Oct. 1, 1962 2 Sheets-Sheet 2 FIG,5

@M fm @M United States Patent O 3,208,412 SUSPENDED METAL CLAD REFRACTORY James A. Crookston, Neil E. Boyer, and Charles M.

Hodges, Mexico, Mo., assignors to A. P. Green Fire Brick Company, Mexico, Mo., a corporation of Missouri Filed Oct. 1, 1962, Ser. No. 227,414 2 Claims. (Cl. 110-99) The present invention relates to metal clad refractories adapted to be suspended from a furnace roof. In particular, the present invention relates to a metal cased basic refractory having an indentation adjacent to one end thereof which is partially lined with the metal casing and to a method of making same.

There are many present constructions which are suitable for suspending from a blast furnace roof, however, these constructions all have certain inherent defects including high cost of manufacture, diiculty of installation, weakness of the suspending means, etc.

It is therefore an object of the present invention to provide a metal clad refractory brick having a socket adjacent to one end thereof in which the socket is partially lined with inwardly bent portions of the metal casing to provide strength to the socket.

It is another object of the present invention to provide a refractory brick having a continuous metal casing with integral suspending means with no extra clips or reenforcement being necessary.

Another object of the present invention is to provide a suspended tile having a socket adjacent to one end thereof wherein the socket cooperates with an internal spacer of S-shaped conguration to provide additional support when the brick is suspended from an anchor in the furnace roof.

Another object of the present invention is to provide a metal blank having a cross shaped score adjacent to one end thereof.

These and other objects will become apparent hereinafter.

In the drawings wherein like numbers refer to like parts wherever they occur:

FIG. 1 is a plan view of a metal blank from which the brick casing is made,

FIG. 2 is a perspective view of the blank formed into a continuous geometrical shape,

FIG. 3 is a view similar to FIG. 2 showing the casing filled with refractory mix,

FIG. 4 is a perspective view of thel final brick shape,

FIG. 5 is a perspective view of a brick having an internal spacer,

FIG. 6 is a fragmentary enlarged perspective view of an end of the brick shown in FIG. 5,

FIG. 7 is a fragmentary sectional view taken on line 7-7 of FIG. 6, and

FIG. 8 is a fragmentary sectional view taken along line 8*8 of FIG. 7.

In the present invention, a metal blank 10 which comprises a body 11 defined by opposed end margins 12 and connecting side margins 13 is utilized. The blank 10 is provided with a cross shaped score 14 comprising a pair of intersecting score lines 15 and 16 adjacent to one end margin 12. The first score 15 is parallel to the adjacent end margin 12 and the second score 16 intersects the first score 15 at approximate right angles and also intersects the adjacent end margin 12. The second score 16 is about 11/2 times the length of the first score 15.

After the rectangularly shaped blank 10 is provided with the cross or cross-shaped score 14 adjacent to one end, it is formed into a preformed continuous casing 17 having only one fabrication seam 18. The casing 17 is of elliptical or other shape having rounded corners, and has a predetermined cross-sectional area and an established perimeter. The casing 17 then is filled with a refractory mix 19 through an open end and vibrated to partial density, i.e., about of its linal density (as indicated by the arrows A in FIG. 3).

The casing 17 and refractory mix 19 then are placed into a press (indicated by the arrows B in FIG. 4) having a die aligned with the score 14, and are pressed into a brick 20 of desired shape and density (as shown in FIG. 4). Substantially instanteously therewith, the casing 17 is broken along the score 14 to form an indentation 21 which consists of a deep socket 22 spaced from one end 23 of the brick 20 and connected to said end by a shallow trough 24. The indentation 21 is in the front face 25 of the brick 20 and the socket portion 22 extends in depth more than one-half the width of the side faces 26 toward the back face 27. The indentation 21 is adjacent to the cold end 23 of the brick 20, i.e., the end most removed from the heat of the furnace, and is adapted to fit over a suitable hook on the furnace superstructure.

The portion of the metal casing 17 which is adjacent to the score 14 is bent inwardly into the refractory mix 19 to form at least a partial lining for the indentation 21. When the brick 20 is suspended from a suitable hook in a roof ceiling, the portion of the metal casing 17 which lines the indentation 21 withstands the load of the brick 20. The metal of the casing 17 imparts the majority of the strength to the suspended shape or brick 20. In tests of the strength, loads on the order of 3,000 pounds are required to break the socket 22.

A variation of the present invention is shown in FIGS. 5-8, and in this variation, an S-shaped internal spacer 30 is positioned within the preformed scored casing 17 prior to filling the casing 17 with the refractory mix 19. After the casing 17 has been iilled with the refractory mix 19 and the refractory filled casing 17 has been vibrated to partial density, the casing 17 and the refractory 19 are pressed into a brick 20a having the desired final shape and density. During the final pressing, the indentation 21a is formed in the brick 20a. The socket portion 22a of the indentation 21a extends into and deforms the internal spacer 30 so that a portion 31 of the spacer 30 forms a partial lining for the deepest portion of the socket 22a to impart additional strength to the brick 20a, when it is suspended from a furnace roof.

The indentation 21a, including the socket 22a and the trough 24a shown in detail in FIGS. 6-8, is similar to the construction of the indentation 21, the socket 22 and the trough 24 shown in FIG. 4, except for the additional strength afforded by the deformation of the spacer 30.

Other forms of the internal spacer may be used and the spacer may be terminated below the socket 22 if the additional strength imparted by the spacer is not necessary to adequately support the brick.

This invention is intended to cover all changes and modifications of the example of the invention herein chosen for purposes of the disclosure, which do not constitute departures from the spirit and scope of the invention.

What is claimed is:

1. A metal cased refractory brick comprising a multisided one piece continuous metal casing having only a single fabrication seam, and refractory material firmly retained within the casing, said brick being provided with a socket in a side wall adjacent to one end, said socket having a deep portion spaced from the end of the brick 3 by a shallow portion, the casing being deformed and split at the socket, said casing being in close contacting relation to the refractory and conforming to the shape of the inner surface of the socket and partially lining the same to reinforce the same.

2. The structure of claim 1 including a metal spacer longitudinally positioned in the brick between the side Wall having the socket formed therein and an opposite side wall and embedded in the refractory, said spacer intersecting the socket and having a deformed portion lining a portion of the socket to further reinforce the same.

References Cited by the Examiner UNITED STATES PATENTS 1,837,451 12/31 Lee 50--416 X 4 Naylor 50-413 Goldschmidt 50-413 Heuer.

Voity et al. 29-190 Elrad 29--190 Coffman et al 29--432 Ogle.

Mason et al 110-99 Gallagher et al. 29--432 Great Britain.

JAMES W. WESTHAVER, Primary Examiner.

15 ARTHUR M. HORTON, FREDERICK KETTEREP Examiners. 

1. A METAL CASED REFRACTORY BRICK COMPRISING A MULTISIDED ONE PIECE CONTINUOUS METAL CASING HAVING ONLY A SINGLE FABRICATION SEAM, AND REFRACTORY MATERIAL FIRMLY RETAINED WITHIN THE CASING, SAID BRICK BEING PROVIDED WITH A SOCKET IN A SIDE WALL ADJACENT TO ONE END, SAID SOCKET HAVING A DEEP PORTION SPACED FROM THE END OF THE BRICK BY A SHALLOW PORTION, THE CASING BEING DEFORMED AND SPLIT AT THE SOCKET, SAID CASING BEING IN CLOSE CONTACTING RELATION TO THE REFRACTORY AND CONFORMING TO THE SHAPE OF THE INNER SURFACE OF THE SOCKET AND PARTIALLY LINING THE SAME TO REINFORCE THE SAME. 